a lot more friendly than dallas. > dallas and all the other airports employ government screeners. sa francisco is one major airport that to hire screeners that work at a private company. they are better at finding stuff. they were twice as good finding con from a band. why were they better. here is the reason. practice. he have a security cards, faster screener will win $2,000. there is dramatic music. >> tsa trains it's screeners, too, but not like this. in this competition they search bags and identify forbidden item. here is pipe bomb. then they rush toetest the bag. >> in this test they look at slides of people and try to remember details. how many buttons are on her sleeve? >> four? >> yes. >>. >> john: the private company makes these screeners special. >> they have to be able to look at something and look at a lot of people and be able to retain what they saw. you find out who is really good at this. >> we are really competitive. >> they love the contest. >> so usually, if you tell them the score and you wanted to be the winner. it's like bragging rights. >> they get better